Find out about peritoneal dialysis, what life is like while on it and the prognosis for those suffering from this condition. Learn how long a patient can be on peritoneal dialysis while awaiting kidney transplant.
Erasers are made from either natural or synthetic rubber. Natural rubber is produced from latex that is collected from rubber trees. Water is removed from the latex, increasing the rubber content to 60%. Acid is added to the liquid concentrate in order to produce solid sheets of dry rubber.
Nairne is now credited with the invention of the rubber eraser. The early rubber erasers were perishable and they didnât become commonly used until after 1839, when Charles Goodyear discovered vulcanization to make rubber more durable. The pencil eraser was invented by Hymen L. Lipman in 1858.